Sex Act. When you have sex, anal or vaginal, the girl lies on top on the man, he enters her from behind and uses his hands one to strum her vulva the other to grasp her breasts, like playing a Guitar
Joe: So I was think of geting a tattoo.
John:Of what?
Joe: godzilla riding a skateboard playing guitar
John:OMFG thats the greatest thing ive ever heard!